I think all (or at least most) of the fields in the profile are required. If you don't want to put anything there, you might be able to get away with just putting a space in the fields you want to leave blank.
"You take turns, advise and protect one another, even heal or be healed when the going gets too tough. I know! That's not a game--that's friendship!" ~Shelly Mezzanoble,
Confessions of a Part-Time Sorceress: A Girl's Guide to the Dungeons & Dragons Game Darcy\'s Place
